butterfly valve manufacturer

In the cylindrical channel of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis, with a rotation angle between 0 ° and 90 °. When it rotates to 90 °, the butterfly valve is fully open, and the thickness of the butterfly plate is the only resistance for the medium to flow through the valve body, resulting in a small pressure drop; As the rotation angle of the butterfly plate gradually decreases and the valve opening decreases, it is possible to adjust the flow rate of the medium; When rotated to 0 °, the valve closes, cutting off the flow of the medium.

Advantages: Simple structure, mainly composed of a few parts, low manufacturing and maintenance costs; Small size, light weight, low material consumption, small installation size, suitable for places with small installation space; Quick switch, only need to rotate 90 ° to quickly open and close, easy to operate, small driving torque; Has good fluid control characteristics, can control fluid flow by precisely controlling the rotation angle of the valve plate, and has high flow control accuracy; The movement of the butterfly plate relative to the valve body has wiping properties, making most butterfly valves suitable for media with suspended solid particles, including mud, etc.

The main components of butterfly valves are:

Valve body: The shell that connects pipes, often made of cast iron, stainless steel, or plastic.

Valve plate: a disc-shaped opening and closing component that can rotate around the valve stem, commonly made of carbon steel, stainless steel, or rubber coating.

Valve stem: The shaft that drives the valve plate to rotate, made of corrosion-resistant material.

Sealing ring: installed on the valve body or valve plate, used for sealing, divided into soft seal and hard seal.

The working principle of butterfly valve:

Open: The valve plate rotates parallel to the pipeline axis, minimizing fluid resistance and fully opening the passage.

Close: The valve plate rotates perpendicular to the pipeline axis, and the sealing ring is tightly attached to the valve plate to block the fluid.

Adjust flow rate: By controlling the rotation angle of the valve plate, the flow area can be changed to achieve flow regulation.